If you have a multimeter, you should test the output voltage or electric current of the "power supply jack",generally we call it Toshiba laptop DC adapter . does the pointer move? if not ,the jack is the issue. for the toshiba laptop battery can't get the voltage from the adapter. u should change the adapter for your toshiba laptop

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So...................1) Am I to assume someone broke the female connector on the motherboard, that the DC Power Harness used to plug into?

Hard wired in this statement would reflect there was a DC Power Harness, soldered directly to the motherboard?

2) Or is your statement that the DC Power Jack itself, for your model; is soldered directly to the motherboard; and you hard wired the new jack in place; after cutting the plug off of the end of the new DC Power Harness? (And removing defunct DC Power Jack)

Plus; Is this an A205-s5000, or one of the A205-s5000 model series?A205-s5800, A205-s5801, A205-s5803, A205-S5843, etc.

Yes.

Trying to figure out why this A205, has a DC Power Jack soldered directly to the motherboard, and is not using a DC Power Harness.

Why?

Have to make sure you are soldering to the right area, yet alone the correct contact points.

Don't know what I'm talking about? You unsoldered the DC Power Jack FROM the motherboard? Or the jack was soldered to wires, and wired to the motherboard. Hardwired. The term can be used for either scenario. That's the way it was originally?

K

Let's go on.

The DC Power Jack is connected to the DC to DC power circuit; on the motherboard. (Power/Charging circuit)This circuit is near where the DC Power Jack is mounted, or where the DC Power Harness plugs in.

In the circuit are Surface Mount Devices that are prone to go bad.One is the Power MOSFET's, the second are MLCC's.

These series of Notebook PC's use the;Fairchild Semiconductor International - FDS6679 - Power MOSFET, and the,Alpha & Omega Semiconductor Limited - AO4407 - Power MOSFET.

Look at the second photo down, with the AO4407 circled in Yellow.Immediately below it, (Right corner), and immediately to the right of the AO4407; are MLCC's.Smaller rectangular object with a dark wide band in the middle of it.

There is one above the one, to the immediate right of the AO4407; one above it, one to the Right of the top one; and one to the right of it.There are also 4 smaller examples to the bottom/left corner of the AO4407.

1) Test the AC adapter (Charger)Test with a multimeter set to DC Voltage. You should read VERY close to 19 Volts. (DC)

While testing have an assistant gently wiggle the power cord TO the AC adapter, and the power cable coming FROM the AC adapter.See if there is an intermittent reading for either one. Indicates a break in the wire/s.

2) AC adapter checks out OK go to the DC Power Jack. This jack is the port on the side of the laptop, that the AC adapter plugs into.(DC IN)

Remove the Battery, see if you can gently wiggle the Center Pin. Use a non-metallic object, or tool.

Also check if the metal shell inside the DC Power Jack moves around.ANY perceptible movement indicates a problem with the DC Power Jack.

Fortunately, for this model the DC Power Jack is a Power Jack Harness,

You don't mention if you get any lights on the laptop as it tries to boot up..Firstly, remove battery, unplug from mains and hold power button down for 30 seconds.Reconnect to mains and try to boot, if it works ok, replace battery and try again.

If no luck, test the dc voltage at the charger pin, it should be 19 volts ( connect one probe of a multimeter to the inner connection (red probe) and the other ( black probe) to the outer part of the jack.

If this is not outputting 19 volts, try using another charger

Is the DC jack socket loose? If so this will cause it to shut down and the jack socket will need replacing

Check also that the power button is not sticking and (if fitted) the small rubber pin usually near the screen base on the top cover is not sticking inRemove ram modules, replace one and test it, then the other one to eliminate ram problems

fist pull the battery completely and leave out for a few minutes.
second press hold power button battery still out no adapter connected
third re-install the battery / power adapter then try er out again.

The DC jack in the computer has detached itself from the motherboard causing intermittent shutdowns, the laptop must be dis-assembled to re-solder the jack back in place, and may need to replace the DC jack if the old one is not suitable.

1) Check to make sure the problem isn't the cable going into the plug, from the AC adapter. (Charger)A lot of times, where the wires meet the back of the plug, that goes into the laptop DC Power Jack, is bad.The wires have a break from becoming stretched. Makes an intermittent contact.Same thing for where the wires meet the charger body.

AC adapter plugged into power, unplugged from laptop, use a multimeter set to the DC voltage scale.Use the alligator clip attachments for the probe leads, attach the probe lead's to the AC adapter's plug, and wiggle the wire, check for an intermittent break.

2) AC adapter (Charger) unplugged from laptop, Battery removed, see if you can wiggle the center pin of the jack.You may find the entire DC Power Jack will move a little.

If the center pin does not move, but the entire body of the jack does, the jack may just need to be resoldered to the motherboard. The solder connections may be cracked.If the center pin moves, replace the jack.

To replace the DC Power Jack, or repair the solder connections,

1) Remove all power to the laptop. AC adapter and Battery.

2) Observe Anti-Static Precautions:Buy and wear an ESD wrist strap. (Electro Static Discharge) Connect the alligator clip to a good ground source. I connect mine to the metal frame of an open, empty desktop computer case.(You don't need an Anti-Static Mat)The price of an ESD wrist strap is around $3 to $8. Found in a multitude of places.Example,

TIPS:A) You may wish to take photos, or make a video as you disassemble, for your first time. Also make notes.After the first laptop the next one becomes easier.(All of them follow a basic path when disassembling. Toshiba, HP, Acer, Gateway, you name it)

B) Use a multi-container for the various screws. Label each container for the area the screws came out of.There may be 60 or more screws, and 12 different types of screws. Some look VERY similar to each other, but are NOT. DO NOT mix them up.You can use a clean egg container in a pinch. Label each egg holder.

C) Take your time, use patience. Practice your soldering, de-soldering skills before working on the Toshiba's DC Power Jack, if you're rusty.Use Desoldering Braid, and not a Desoldering Tool. (Solder S-ucker) The desoldering braid works MUCH better! (Also known as solder wick)

Pictorial, with details on how to disassemble the Toshiba Satellite A70, or A75 series of laptops,

Go down to the line that begins with Satellite A10.Scroll across to A70, and click on it.This is a PDF file. May take up to 30 seconds before you see the first page.May take additional time to fully download.(Took me around 40 seconds before I saw the first page, with a medium speed DSL connection)

Your having a problem with the dc jack on your motherboard. What needs to happen is the motherboard needs to be taken out and there will be solder points underneath the dc jack on the motherboard.
These solder points need to be resoldered so that way the dc jack stays in place properly.
At this point you should be able to hook up your ac adaptor and use your laptop that way.

There are several companies online, or you can find someone in your area, the "AC Power Jack" that you plug into, is soldered onto the Motherboard using 2-4 "Prongs", one or more of yours has "Broken", and isn't making a connection, while the Price of the part is cheap, the repair is "Difficult" if you are trained to do the repair, but I have done 6 or 7 myself, so it is possible, But damage to the Motherboard can occur when soldering the new jack in,"Burning" a contact or something, best to take it to a repair shop,$150-$175, or $5-15 if you can do it yourself, Again "DIFFICULT", so the repair shop is your best bet, the online companies have Guaranties against damage. Google "Laptop DC jack repair"http://www.DCJackRepair.NET is in the sponsered results. There are self help pages for the repair,http://www.laptoprepair101.com/laptop/2007/12/06/dc-power-jack-repair-guide/Please read DISCLAIMER on the page, hope this helps, Please rate it a fixya,Gomez

you can follow this instruction and try to your laptop to resolved the problem.

A bad connection between DC-IN power jack on the system board and the system board is a very common problem with Toshiba Satellite M35X and Toshiba Satellite A70/A75 notebooks. If your laptop is out of warranty, then you can fix the problem by resoldering DC-IN jack on the system board. If it’s still under warranty, it would be fixed at no charge to you.
Problem symptoms:

Laptop randomly shuts down without any warning.

Power LED and battery charge LED start flickering when you wiggle the power cord or the AC adapter tip on the back or your laptop.

The battery will not get charged.

When you plug AC adapter, the laptop appears to be dead and there is no LED activity at all (DC-IN jack on the system board is broken).

To fix the problem, you have to take your laptop apart, remove the system board to resoleder or replace the DC-IN jack. Toshiba Satellite M35X and Toshiba Satellite A70/A75 disassembly guides will help you to remove the system board. Take a closer look at the power jack on the system board with a magnifying glass. In most cases you get the power problem because of a bad connection between the DC jack and the system board, you’ll see a crack between the DC jack connector and the system board.Here is an example of Toshiba Satellite M35X power jack. The crack occurs between the DC jack pin and the system board.
In some cases the connection is good, but the DC jack is bad itself. You can find a new DC jack for Toshiba Satellite M35X and Toshiba Satellite A70/A75 laptops here. Search for DC jack M35X or DC jack A75.How to resolder laptop power jack yourself.UPDATE:
Sometimes, after you replace the jack, you can see that the system board doesn’t get power at all. The battery will not charge and the power LED will not light when you plug in the AC adapter. So, here’s a possible explanation.When a connection between the positive pin and the motherboard breaks (cracks), the power jack gets loose. You can feel it when you plug in the adapter plug. A loose power jack can damage the trace inside the hole in the system board. Take a look at the picture.
As you see, the positive pin goes through the hole in the system board and you solder it on the top side. Right? What if the trace between the top side and the bottom side is broken somewhere inside the hole? I’ve seen it before a few times. In this case everything looks nice and clean on the top side. When you plug in the AC adapter, you get normal voltage readings between “+” and “-“ pins on the top side, but the power DOESN’T go to the motherboard at all, because there is no connection between the top and bottom sides. Test with a multimeter if there is a connection between the top and the bottom.If the trace inside the hole is broken you still can fix it. You can run a wire to connect the top and the bottom sides. Be careful not to short something on the board.Update:
Here’s another solution to fix the power jack problem, it shows how to relocate the power jack outside the laptop base. Check it out here: Toshiba Satellite A75 failed power jack workaround.
When you repair a loose power jack, it’s a good idea to check the jack on both sides of the motherboard. When you remove the top cover from a Toshiba Satellite A70/A75 laptop you can see only points where the jack is soldered to the motherboard as it shown on the second picture in this post, but you cannot see the jack itself as it shown on the first picture.Removing the motherboard from Satellite A70/A75 laptop is a good idea because the jack itself might has a broken “+” pin, as it shown on the picture below. If the “+” broke off the base, you’ll have to replace the jack.